Ground motions with strong pulse-like features are of special concern for structural engineers. Detection and characterization of the pulse-like features are fundamental in seismic hazard analysis, ground motion selection/simulation, and structural analysis. From the perspective of earthquake engineering, a pulse-like feature in a ground motion is of significance only if it dominates certain structural response to the ground motion. In order to identify such kind of pulse-like features, the current study establishes the so-called response spectra associated with various velocity waveforms through dimensional analysis of structural response to a generic velocity pulse. The congruence and the shifts between the ${\text{Π}}_{PV}$ and the pseudo-velocity response spectra associated with identical velocity waveform allow automatic detection of velocity pulses through adaptive similarity search in bi-logarithmic spectrum curves. Following this approach, velocity pulses are detected and characterized in hundreds of historical ground motion records. The majority of the detection results are comparable to the velocity pulses identified through wavelet analysis in literature, while significant differences are noticed for a few cases. Further investigation shows our approach is able to capture the velocity pulse that retains the impulsive effect of the original ground motion on structures and thus provides a worthy supplement to the existing pulse identification methods.

结构工程师特别关注具有强烈脉冲状特征的地面运动。脉冲状特征的检测和表征是地震危险性分析、地震动选择/模拟和结构分析的基础。从地震工程的角度来看，地震动中的脉冲状特征只有在它主导了某些结构对地震动的响应时才有意义。为了识别这种类脉冲特征，目前的研究通过对一般速度脉冲的结构响应进行量纲分析，建立了与各种速度波形相关的所谓响应谱。一致性和两者之间的转变${\text{Π}}_{磷伏}$与相同速度波形相关的伪速度响应谱允许通过双对数谱曲线中的自适应相似性搜索自动检测速度脉冲。按照这种方法，速度脉冲在数百个历史地面运动记录中被检测和表征。大多数检测结果与文献中通过小波分析识别的速度脉冲相当，但在少数情况下注意到显着差异。进一步的研究表明，我们的方法能够捕获速度脉冲，保留了原始地震动对结构的脉冲效应，从而为现有的脉冲识别方法提供了有价值的补充。